Sorbitan Oleate (Span 80) CAS 1338-43-8 / INS 494 / E494 is a lipophilic nonionic emulsifier for food and supplement formulation work. It is the sorbitan ester of oleic acid, supplied as a yellow oily viscous liquid with an HLB value around 4.3. In food systems it is used for water-in-oil emulsification, oil dispersion, and emulsion stabilization where a low-HLB emulsifier is needed.

*These are formulation screening ranges, not a recommended daily intake. The actual permitted level depends on food category, jurisdiction, total sorbitan ester exposure, and finished-product label/regulatory requirements.

Mechanistic highlights

1. Low-HLB emulsifier behavior: Span 80 is oil-soluble and preferentially sits at the oil/water interface from the lipid side, making it more suitable for W/O emulsions than for clear aqueous systems.
2. Droplet stabilization: It reduces interfacial tension and helps form smaller, more stable droplets when adequate shear and the correct emulsifier balance are used.
3. HLB blending: For O/W systems, combine with high-HLB food-permitted emulsifiers and calculate a blended HLB close to the required HLB of the oil phase.
4. Process compatibility: Add into the oil phase or oil premix before emulsification. Warm gently if viscosity is high, then homogenize with the aqueous phase using suitable shear.

Safety & practical use

• Best use: Food-processing emulsifier/co-emulsifier only. Do not position as a health-benefit supplement ingredient.
• Practical starting point: Begin around 0.1-0.3% in fat-rich emulsions, then adjust based on droplet size, phase separation, mouthfeel, and regulatory limits.
• Formula fit: Best suited to oil-rich fillings, flavor/oil concentrates, lipid-soluble active premixes, and W/O or multiple-emulsion prototypes. It will not make a clear water solution.
• Regulatory control: Confirm local food-additive permission, maximum use level, and label declaration before sale. U.S. FDA lists sorbitan monooleate as an emulsifier/emulsifier salt and 21 CFR 173.75 covers specific sugar-processing uses.
• Storage: Store tightly closed at room temperature, protected from heat, light, and air to reduce oxidation and viscosity/color change.